Influence of bending strain on mono- and multi-filamentary MgB2/Nb/Cu wires and tapes

• Published in: Physica. C, Superconductivity Vol. 484; pp. 163 - 166
• Main Authors: Wang, Qingyang, Yan, Guo, Zhang, Pingxiang, Sulpice, Andre, Yang, Fang, Xiong, Xiaomei, Feng, Jianqing, Ji, Ping, Li, Chengshan
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01-01-2013; Elsevier
• Subjects: Applied sciences; Bending strain; Condensed Matter; Electrical engineering. Electrical power engineering; Engineering Sciences; Exact sciences and technology; Materials; MgB2 superconductor; Physics; Superconductivity; Wires and tapes; Wires and tapes; MgB2 superconductor; Bending strain; Powder in tube technique; Critical current density; MgB; Bending stress; Superconducting wires; Multifilamentary superconductor; Current carrying capacity; Magnesium boride; Superconducting tapes; superconductor; High temperature superconductor
• ISSN: 0921-4534; 1873-2143
• DOI: 10.1016/j.physc.2012.03.071

► A bending test device has been developed in this work. ► The critical current density Jc is decrease with decreasing the bending diameter. ► A sharp decrease in Jc is appeared while the bending diameter small than 50mm.
This paper aims at examining the bending mechanical properties of MgB2/Nb/Cu wires and tapes fabricated with in situ powder in tube (PIT) method. The bending characteristics of five different MgB2 wires and tapes including four wires with mono-, 6-, 12-, and 36-filamentary and a 6-filamentary tapes were tested. The critical current density (Ic) as a function of bending diameter was measured and compared for all the prepared samples. This study aims at giving a clear picture of the optimum bending conditions at which MgB2 wires will possess a high current carrying capacity for practical applications.